Transmission belt



Nov. 13; 1928. 1,691,892

P. B. REEVES TRANSMI S S I ON BELT Filed March s, 1926 2 sheets-sheet 2 l TTORNEYLS Patented Nov. 13, 1928.

Unirse. s'rares rarsnjer PAUL E. REEVES, 0E coLMB-us, militaire, AssrsiionronEEvEs rnLLEY` cori/nenni?,

f 0E coi'foivizeUs,Y In'nrnns., A eonronn'rron 0E InnrAna] riannsiaission BELT.

Appncannn filed March 5, 192e. semi N5 eases.

My invention relates to an improved form rof drive chain in'wliicli the power is delivered usually provided an endlessV flexible chain .having secured throughtransverse bars provided `'ith inclined A'faced ends and it is one p of the objects of the present invention to provide an improved means for securing these transverse bars to the flexible endless chain.

For the purpose of disclosing my invention I have disclosed certain `enfibodiinents thereof in the accompanying drawings in which Fig. l is a top-bottom plan view of a partion of a drive chain embodying my invention; E

Fig. 2 is a sideelevation-thereof partly in p section;

Fig. 3 is a sectional view taken on the line Fig. 4 is atransverse section of one or" the bars secured to the chain; y

Fig; 5 is a longitudinal section ofl one 'of said bars;

i Fig.V 6 is a plan view of a ReevesWtransmission equipped with my improved belt;

Fig. 7 is a side elevation partly in section of a modified form oil" the improved belt;

Fig. 8 is anv end view partly in sectionof the structure illustrated in Fig. 7

Fig. 9 is a longitudinal sectional view of another form offbelt embodying'iny inven tion, and

Fig. 10 is an end view partly in section of the structure illustrated in Fig. V l

In the structure illustrated, having now particular reference to that illustrated in Figs. l to 5, I provide an endless chain belt formed of a plurality of interdigitated transverse series of links 1 each of which is perfoifated near its end to receive pivot or rocker pins 2. A link belt of this characterand oic the width sulicient for co-operation with th Reeves pulley type of transmission would ordinarily be of such weight as to be impractical and in order to obtain satisfactory results and at the saine time reduce the weight of the belt7rI arrange the links in the form of two edge series of links and a center series of links, the center series being spaced apart from the edge series by tubular spaces 3 lsurrounding tubular sleeves et onthe pivot pins 2 -aiid which reecive certain of the linksoi'r the chain. f

rllhe transverse bars which are adapted to be securedto the chain above described are preierably cast from aluminum or some similar light metal and compris-e the hollow bottom Asection 5 having inclinedend walls 6 adaptedA to receive ontheir outer faces friction tips or end members 7 generally formed of leather.

These tips 7 are secured to the end walls 6 by j.

means oi suitable rivets 8 passing` through the end walls and through the tips. The bottom wall oi? the section 5 is provided with a pair of upwardly extending seat lugs 9 having their upper faces curved to coincide with the curvature of the spacers 3 and of suiitici'entv Y transverse width to lit between the center and outer'links.' `A top clamping member l0 isv bridged between the end vwalls 6 having tongues llwhich take into slots'l formed in the tops ot the end walls. The ends of the top clamps l0 bear; against the inner faces of the end walls 6 and fit into `Jshaped recesses i3 onthe innerface of the 'end walls. This clamping memberlike the bottoni section' is provided with seat lugs lll. having their bottom faces curved to coincide with the spacers 3 on the chain and these seat lugs are similarly of such width as to iit'between the center'and r`side links. The two sections V5 and l0 are'se- 9 and 14 cured together and the seat lugs clamped upon the spacers 3 by means of bolts or cap screws '15;passing through the topsection l0 and into the bottoni wall ofthe bottom section. l/Vhen'assembling the cross bars upon the chain the cap screws l5 are drawn up until the seat lugs securely clamp the topand bottom seat lugs upon the spacers 3. By this arrangement the transverse bars are securely heldin position on the chain and at the saine time the links oil-.the chain are subjected to no clamping or distorting stress whereby the links will beperifectly- 'free vto .move on their pivots. i In the structure illustrated in Figs. 7 and 8, for securing the cross bars in position, l provide for each' cross bar a pair of studs 16 eX y tending between the bottom section. 5 and the top clamping section 10. These studs are provided at their ends with reduced; portions or ieu thereon, the reduced portion forming shoulders on which the top `andbottoin sections tips 7, a spacer and bridge member bear.` These studsare provided Vivith ears 1S adapted to surround the sleevesl on the pivot pins 2. In this structure as well as thestructure illustrated in Figs. l to -l it will be noted that the parte oit the cross bars are clamped together and upon the chain there is no clamping strain on the links of the chain and these links accordingly are free to move on the'pivot pins without obstruction or distortion.

In the structure illustrated in 9 and 10 the cross bars compriseapair ot' transverse,bridgeinembers I9 and 20 havi their ends upturned as at 2l to receive the friction 1 being interposed between the tips and the turned up portions 21 of the members 19 and 20 and kspacingthe gap between the two bridge inembers at their ends. T ie bridge members are clamped upon the cli-ain by means oit' `rivets 23 extending through the saine and in order that` the clamping stress may betaken oil the chain links. I interpose between the bridge members 19 and 2O spacers 2iwhich are adapted to rest on the sleevesy 4 oit the pivot pins 2. These spacers are Vpreferably arched so` as to coincide with'the curvature oit' the sleeves and tlie rivets 28 pass through these spacers 24 to prevent lateral displacement thereof.

Forlubricating vthe links of the structure illustrated in Figs. l to 5 and particularly the central links thereof, I provide an endless' strip V of absorbent material such for in'- stance as felt, which `extends through Vthe channel'formed between the lugs on the bottom bridge member. A suitable oil openingr 26 is formed in the bottom bridge membery opposite the lubricating strip125 so that the i operator during the running of the belt may,

by holding an'oil can over the lubricating belt 25 deposit on the belt between thecross Ybars and through the opening 26 su'liieient lubrication which willeventually find its way to the series of links.

I claim as my invention:

Vl. A drive belt comprising an endless series ofpivotally connected links the pivotal bearing points of which are in axial alignment, two series of friction taces arranged in the 'y to the edges of said bridge members.

3. A drive belt comprising a series of spaced apart pressure members, friction faces secured at the opposite end of said meinbeis, a seriesxof pivotally connected links, the pivotalbearing points of which are in axial alignment, passing between said spaced apartpressure members and means independent of the links for directly connecting the pressure members to the pivots oit' said links.

ll. A drive belt comprising arseries ot interdigitated pivotallyconnected chain links, the pivotal bearing points ot which are in axial alignment, top and bottom transversely extending bridge members directly clamped to the pivot members ol saidlin is and triction faces secured to the opposite ends of the ibridge members.

n 5. A drive belt comprising an endless series ot'interdigitatedlinks, pivot pins connecting said links, sleeves surrounding saidipivot pins, a series of transversely,extending bridge members clamped upon said sleeves and fric? tion 'faces secured at the opposite vends of said bridge members.

6. A drive belt comprising a series of interdigitated chain links, pivot pins for ,connectingsaid links, sleevesv surroundinfy 'said pivot pins, top and bottoml transversely extending 4pressure bridge members having llugs bearing' upon said sleeves, yclamping means extending through said bridge'members for clamping said lugs upon said sleeves and 'triction `faces secured at the opposite endsgof saidV bridge members.

terdigitated pivotally" connected chain links, sleeves surroundingthe pivot members vof said links, top and bottom transversely exc tending bridge members, thexbottonr bridge member 'having upwardly extending divergf ing side faces and the topbridge member being arranged between said side faces,fboth members having inwardly extending lugs bearing upon the sleeves ofthe'pivotmei'i'iberV and means for clamping saiifl-'bridgeeV members together.

8. A drive vbelt comprising a series `ot interdigitated pivotally` connected links. a series of transvei-sely extending pressure 7. A drive belt comprising a seriesof insie ioo

ies

members each having upwardlyextending diverging'v side faces, friction members secured tosaid sidefaces and upwardlyprojecting earsor'lugs on the innerrface of each pressure member connected to the pivots ofthe links. i y i r" In witness whereof, I, PA'Uig,v B. REEVES,

have hereunto 'set my hand atl Indianapolis,

Indiana, this 2nd day VofV March', A; D.' one Vthousand nine hundred` and twenty-six., Y

PAUL B. 

